Revert group id.
[maven-release-plugin] prepare release GameAIArena-1.5.1
Bump up version.
[maven-release-plugin] prepare release GameAIArena-1.5.2
[maven-release-plugin] prepare for next development iteration
Merge branch 'master' of github.com:exKAZUu/GameAIArena

Conflicts:
	pom.xml
Remove Eclipse setting files. Add a sample Java AI program. Add test cases for connecting an AI program via the standard I/O